Difference between revisions of "Promethium(III) bromide"
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| Section2 = {{Chembox Properties | | Section2 = {{Chembox Properties | ||
| − | | Reference = <ref name="Cotton">{{citation | first = Simon | last = Cotton | title = Lanthanide and | + | | Reference = <ref name="Cotton">{{citation | first = Simon | last = Cotton | title = Lanthanide and Actinide Chemistry | edition = 2nd | publisher = Wiley | location = New York | year = 2006 | isbn = 0470010061 | pages = 115–17}}.</ref> |
| Formula = PmBr<sub>3</sub> | | Formula = PmBr<sub>3</sub> | ||
| − | | MolarMass = 386.63 g mol<sup>−1</sup><ref group=note>The molar mass is based on [[promethium-147]] (''t''<sub>½</sub> = 2.6234(2) a; ''A''<sub>r</sub> = {{nowrap|146.915 1385(26)}}), the most commonly encountered isotope of promethium.</ref> | + | | MolarMass = 386.63 g mol<sup>−1</sup> <ref group=note>The molar mass is based on [[promethium-147]] (''t''<sub>½</sub> = 2.6234(2) a; ''A''<sub>r</sub> = {{nowrap|146.915 1385(26)}}), the most commonly encountered isotope of promethium.</ref> |
| Appearance = coral-red solid | | Appearance = coral-red solid | ||
| Density = | | Density = | ||
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| Section3 = {{Chembox Structure | | Section3 = {{Chembox Structure | ||
| Reference = <ref name="Cotton"/><ref>{{citation | first1 = W. R. | last1 = Wilmarth | first2 = R. G. | last2 = Haire | first3 = J. P. | last3 = Young | first4 = D. W. | last4 = Ramey | first5 = J. R. | last5 = Peterson | title = Absorption spectrophotometric and X-ray diffraction studies of the trihalides of promethium in the solid state | journal = J. Less Common Met. | volume = 141 | issue = 2 | year = 1988 | pages = 275–84 | doi = 10.1016/0022-5088(88)90413-4}}.</ref> | | Reference = <ref name="Cotton"/><ref>{{citation | first1 = W. R. | last1 = Wilmarth | first2 = R. G. | last2 = Haire | first3 = J. P. | last3 = Young | first4 = D. W. | last4 = Ramey | first5 = J. R. | last5 = Peterson | title = Absorption spectrophotometric and X-ray diffraction studies of the trihalides of promethium in the solid state | journal = J. Less Common Met. | volume = 141 | issue = 2 | year = 1988 | pages = 275–84 | doi = 10.1016/0022-5088(88)90413-4}}.</ref> | ||
| − | | | + | | CrystalStruct = [[Plutonium tribromide structure|Plutonium tribromide]] |
| Coordination = bicapped trigonal prismatic (Pm<sup>3+</sup>) | | Coordination = bicapped trigonal prismatic (Pm<sup>3+</sup>) | ||
}} | }} | ||
Revision as of 19:51, 8 January 2011
| Promethium(III) bromide | |
|---|---|
| Other names | Promethium tribromide |
| Identifiers | |
| Standard InChI | InChI=1S/3BrH.Pm/h3*1H;/q;;;+3/p-3 |
| Standard InChIKey | GWRKFHUNEGTAQB-UHFFFAOYSA-K |
| CAS number | [] |
| Properties[1] | |
| Chemical formula | PmBr3 |
| Molar mass | 386.63 g mol−1 [note 1] |
| Appearance | coral-red solid |
| Melting point |
624 °C |
| Structure[1][2] | |
| Crystal structure | Plutonium tribromide |
| Coordination geometry | bicapped trigonal prismatic (Pm3+) |
| Thermochemistry[3] | |
| Std enthalpy of formation ΔfH |
−864 kJ mol−1 est. |
| Related compounds | |
| Other anions | Promethium(III) fluoride Promethium(III) chloride Promethium(III) iodide |
| Other cations | Praseodymium(III) bromide Neodymium(III) bromide Samarium(III) bromide Europium(III) bromide |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Promethium(III) bromide, PmBr3, is the only known bromide of promethium. It is prepared (on a 100-µg scale) by reacting gaseous hydrogen bromide with promethium(III) oxide at 500 °C, and has the plutonium tribromide structure with eight-coordinate promethium, isostructural with NdBr3 and SmBr3.[1]
Notes and references
Notes
- ↑ The molar mass is based on promethium-147 (t½ = 2.6234(2) a; Ar = 146.915 1385(26)), the most commonly encountered isotope of promethium.
References
- ↑ 1.0 1.1 1.2 Cotton, Simon Lanthanide and Actinide Chemistry, 2nd ed.; Wiley: New York, 2006; pp 115–17. ISBN 0470010061.
- ↑ Wilmarth, W. R.; Haire, R. G.; Young, J. P.; Ramey, D. W.; Peterson, J. R. Absorption spectrophotometric and X-ray diffraction studies of the trihalides of promethium in the solid state. J. Less Common Met. 1988, 141 (2), 275–84. DOI: 10.1016/0022-5088(88)90413-4.
- ↑ Wishnevsky, V.; Theissig, W.; Weigel, F. The vapor phase hydrolysis of lanthanide(III) bromides IV: Heat and free energy of the reaction PmBr3(s) + H2O(g) ⇌ PmOBr(s) + 2 HBr(g). J. Less Common Met. 1984, 99 (2). DOI: 10.1016/0022-5088(84)90230-3.
Further reading
- Wilmarth, W. R.; Begun, G. M.; Haire, R. G.; Peterson, J. R. Raman spectra of Pm2O3, PmF3, PmCl3, PmBr3 and PmI3. J. Raman Spectrosc. 1988, 19 (4), 271–75. DOI: 10.1002/jrs.1250190410.
External links
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